"elezione supplementare" meaning in Italian

{
  "forms": [
    {
      "form": "elezioni supplementari",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "elezione supplementare f (plural elezioni supplementari)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "by-election"
      ],
      "id": "en-elezione_supplementare-it-noun-IRllDKkp",
      "links": [
        [
          "by-election",
          "by-election"
        ]
      ],
      "raw_glosses": [
        "(usually in the plural) by-election"
      ],
      "synonyms": [
        {
          "word": "elezione suppletiva"
        }
      ],
      "tags": [
        "feminine",
        "plural-normally"
      ]
    }
  ],
  "word": "elezione supplementare"
}

{
  "forms": [
    {
      "form": "elezioni supplementari",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "elezione supplementare f (plural elezioni supplementari)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian feminine nouns",
        "Italian lemmas",
        "Italian multiword terms",
        "Italian nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "by-election"
      ],
      "links": [
        [
          "by-election",
          "by-election"
        ]
      ],
      "raw_glosses": [
        "(usually in the plural) by-election"
      ],
      "synonyms": [
        {
          "word": "elezione suppletiva"
        }
      ],
      "tags": [
        "feminine",
        "plural-normally"
      ]
    }
  ],
  "word": "elezione supplementare"
}